Rotary engine.



F. TOMPKINS. ROTARY ENGINE. APPLIOATION FILED JAN. 2. 1909.

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INVENTOR "TOR/V5781 Patented Mar. 2, 1909.

'UNiTED STATES PATENT OFFICE;

FRANKLIN TOMPKINS, OF NEW DORP, NEW YORK.

ao'ranr ENGINE.

Specification of Letters Patent.

Patented March 2, 1909.

Application filed January 2, 1909. Serial No. 470,385. I

a s ification such as will enable those, skiliiail in the art to whichit appertains to make and use the same.

This invention relates to rotary engines,

pumps and other apparatus of this class, and

particularly to a paratus of this class that employs a cylin cal casingin which is eccentrically mounted a rotatable piston member providedwith radially movable piston blades; and the object of the invention isto provide an apparatus of the class s ecified in which the rotatablemember an radially movable blades are so formed as to prevent the craming, twisting or locking of the said blades w en in their outermostposition or at the limit of their outer movement; and with this andother objects in view the invention consists in an apparatus of theclass specified, constructed as hereinafter described and claimed.

The invention is fully disclosed in the fol.-. lowing specification, ofwhich the accompanying drawing forms a part, in which the separate partsof myimprovement are designated by suitable reference characters in eachof the v1ews, and in which:

Figure 1 is a sectional side elevation of a rotary pump casing andinclosed parts made according to my invention; Fig. 2 a section on theline 2-2 of Fig. 1; and, Fig. 3 a view similar to Fi ,1 but showing amodified arran ement o the rotary member and-piston bla es.

In the practice of my invention, as shown in Figs. 1 and-2, I rovide acylindrical casing a, one side a 0 which is detachable and in which iseccentrically mounted the rotary member I). The rotary member t in heform of construction shown, is cross-sha ed form or provided with radialarms I)", four of which are shown, and said rotatable member is providedwith trunnions b? one of which has a bearing 1) in the detachable side aoi the casing 11, and the other of which passes through the oppositeside of said casin and through a stuffing box device a connects therewiand'forms a power shaft 12 with which 1y be connected a'belt or otherpower transmitting device ofany kind or class. The radial arm members bof the ro tatablepart b are slotted longitudinally as shown at b, andthese slots extend through the central portion of the rotary member asclearly shown in Fig. 1, the slots in the opposite arms I; bein incommunication through the center of sai rotary member;

Mounted in the slots b in the radial arm members I) are radially movableblades 0, and these blades are provided at their opposite side edges andadjacent to their inner faces with side trunnions c movable inconcentric grooves 0 formed in the ends or oppo-.

site side portions of the casing a, said grooves being formed around thecentral axis of said chamber and concentric therewith, while thetrunnions of the rotary member b are eccentric to said axis. Withthisconstruction, it will be seen, that as the member b rotates theblades 0 are given a radial movement and in one position of the rotarymember I), or at one point of its rotation, the blades 0 are almostentirely pro'ected from the radial arms or arm members 2 of said rotarymember as clearly shown at the bottom of Figs. 1 and 2, and in order toprevent the blades 0 in'this position from cramping, twistin or lockingby reason of their contact wit walls of the cylindrical casing, Iprovide the inner edges or faces of saidblades with parallel projectingmembers or fingers of which pass through the central portion of therotary member I) in the radial movement of said blades, and theseprojecting members or fingers c on the blades 0 are soarranged that thesaid members or fingers on two opposite blades 0 interlock when saidblades are in their innermost position, while the projecting fin ers ormembers 0 on the other two blades 0 a so interlock Whensaid blades arein their innermost position, and the fingers or members c of one pair ofblades cross the fingers or members 0 of the other pair of blades asclearly indicated in Figs. 1 and 2.

It will be uiiderstood, of course, that the fingers or members 0 of theblades 0 strengthen and brace said blades when in their outermostposition and prevent the same from cramping, looking or twisting betheinner and claimed in an application for Letters Patent of the UnitedStates filed by me Feb. 18, 1908, Serial No. 416,512 which applicationwas allowed Dec. 8, 1908, and the casing a is provided at its oppositesides with inlet and outlet ports or passages d and d through whichsteam is admitted to and escapes from the said casing.

My invention is not limited to the exact form of the rotary member 6herein shown and described, and this rotary member may be formed in thesame manner as in the application above referred to, or as sometimesformed in other a paratus of this class, and it is immaterial whetherthe rotary member be mounted on, or forms a party of a shaft, all thatis necessary in any construction of this kind being that the radiallymovable blades 0 be mounted in radial recesses which extend through thecenter of the rotary member in order that the fingers or members 0 onthe blades 0 may have sufiicient play in said rotary member toaccommodate the operation of said blades.

In Fig. 3 I have shown a modification in which a casing e is employed,said casing consisting of two cylindrical parts 6 which are incommunication at e and in each of which is mounted a rotary member fhaving radial projections f which interlock as shown at f in theoperation of the apparatus. general form of this apparatus is one whichis old and Well known, but with my improvement the radially projectingparts f of the rotary member f are provided, as shown in Figs. 1 and 2,with the radially movable blades 0 having the trunnionsc movable in theconcentric grooves 0 and said blades are provided as shown in Figs. 1and 2 with parallel projecting members or fingers c at 'their inneredges or faces which pass through the central portions of said radialmembers in the operation of the apparatus and as will be readilyunderstood from the description of the construction shown in Figs. 1 and2, and with this or these exceptions the apparatus shown in Fig. 3 willbe constructed in a manner similar to others of its class.

In practice, I also provide the trunnions c of the blades 0 withanti-friction, bearings g which are free to turn on said trunnions within the grooves 0 and these bearings are shown in section in Fig. 2 andindicated in dotted lines in Fig. 1.

My invention is not limited to the exact details of the construction ofthe rotary member and the radially movable blades mounted therein asherein shown and described, and various changes in and modifications ofthis construction may be made, in view of the appended claims,-withoutdeparting from the Thespirit of my invention or sacrificing itsadvantages.

Having fully described my invention, what I claim as new and desire tosecure by Letters Patent, is

1. In an apparatus of the class described, a cylindrical casing, arotary member mounted eccentrically therein and provided withradiallymovable blades, said radially movable blades being mounted in recesseswhich extend through the center of the rotary member, and said bladesbeing provided at their inner edges with projecting fingers or mem berswhich move radially through the cen* tral portion of the rotary memberin the operation of the apparatus, the fingers or members of opposlteblades inter-locking,

and the fingers or members of blades arranged at an angle to each othercrossing eachother during said operation.

2.' In an apparatus of the class described, a cylindrical casing theopposite sides or ends of which are provided with concentric grooves, arotary member eccentrically mounted in said casing and provided withradially movableblades having trunnions movable in said grooves, saidblades being mountcdin radial recesses formed in the ro,

tary member and passing through the center thereof, and the inner edgesof said blades being provided with projecting portions which movethrough the central portion of the rotary member in the operation ofsaid apparatus.

3. In an apparatus of the class described, a cylindrical casing theopposite sides or ends of which are provided with concentric grooves, arotary member eccentrically mounted in said casing and. provided withradially movable blades having trunnions movable in said grooves, saidblades being mounted in radial recesses formed in the rotary member andpassing through the center thereof, and themner edges of said bladesbeing provided with projecting portions which move through the centralportion of the rotarymember in the operation of said apparatus in suchmanner that the projecting portions of opposite blades interlock, and

the projecting portions or blades arranged at an angle to each othercross each other in said operation.

In testimony that I claim the foregoing as my invention I have signed myname in presence of the subscribing witnesses this- 31st day of December1908.

' FRANKLIN TOMPKINS.

Vv'itnesses A. R. APPLEMAN, C. E. MULREANY.

